Question

find the shaded area correct to 1d. p
$(use \: 3.14 \: for \pi$

Answer 1

Diameter of big circle= 10 cm
R=5 cm
Area of big circle= πR²
= 3.14 × (5)²
= 3.14 × 25
= 78.5 cm²

Diameter of small circle=8 cm
r=4 cm
Area of small circle= πr²
= 3.14 × (4)²
= 3.14 × 16
= 50.24 cm²

Area of shaded portion= area of big circle - area of small circle
= 78.5 - 50.24
= 28.26 cm²

Thanks :)